fix: resolve navigation-cache regressions and todo UX

apps/lib/features/todo/data/todo_repository.dart

@@ -46,11 +46,7 @@ class TodoRepository {
     );
     if (cached != null) {
       final next = cached.value
-          .map(
-            (todo) => todo.id == id
-                ? todo.copyWith(status: 'completed', completedAt: now())
-                : todo,
-          )
+          .where((todo) => todo.id != id)
           .toList(growable: false);
       await store.write<CacheEntry<List<TodoResponse>>>(
         pendingListKey,
@@ -58,9 +54,9 @@ class TodoRepository {
       );
     }
 
-    invalidator.invalidate(pendingListKey);
     try {
       await api.completeTodo(id);
+      invalidator.invalidate(pendingListKey);
     } catch (error) {
       if (cached != null) {
         await store.write<CacheEntry<List<TodoResponse>>>(

apps/lib/features/todo/ui/screens/todo_detail_screen.dart

@@ -29,6 +29,7 @@ class _TodoDetailScreenState extends State<TodoDetailScreen> {
 
   TodoResponse? _todo;
   bool _isLoading = true;
+  bool _didMutate = false;
   String? _error;
 
   @override
@@ -122,7 +123,7 @@ class _TodoDetailScreenState extends State<TodoDetailScreen> {
   Widget _buildHeader() {
     return BackTitlePageHeader(
       title: '待办详情',
-      onBack: () => context.pop(),
+      onBack: () => context.pop(_didMutate),
       trailing: _buildHeaderMenu(),
     );
   }
@@ -379,10 +380,11 @@ class _TodoDetailScreenState extends State<TodoDetailScreen> {
     }
     final changed = await context.push<bool>(AppRoutes.todoEdit(_todo!.id));
     if (changed == true) {
-      await _loadTodo();
-      if (mounted && _error != null) {
-        Toast.show(context, '刷新失败: $_error', type: ToastType.error);
+      _didMutate = true;
+      if (!mounted) {
+        return;
       }
+      context.pop(true);
     }
   }
 
@@ -398,7 +400,7 @@ class _TodoDetailScreenState extends State<TodoDetailScreen> {
       try {
         await _todoApi.deleteTodo(_todo!.id);
         if (mounted) {
-          context.pop();
+          context.pop(true);
         }
       } catch (e) {
         if (mounted) {

apps/lib/features/todo/ui/screens/todo_quadrants_screen.dart

@@ -268,11 +268,8 @@ class _TodoQuadrantsScreenState extends State<TodoQuadrantsScreen> {
   Future<void> _completeTodo(TodoResponse todo) async {
     try {
       await _todoRepository.completeTodo(todo.id);
-      if (mounted) {
-        Toast.show(context, '已完成', type: ToastType.success);
-      }
       try {
-        await _loadTodos();
+        await _loadTodos(showPageLoader: false);
       } catch (_) {
         // ignore reload error
       }
@@ -283,14 +280,17 @@ class _TodoQuadrantsScreenState extends State<TodoQuadrantsScreen> {
     }
   }
 
-  void _navigateToDetail(TodoResponse todo) {
-    context.push(AppRoutes.todoDetail(todo.id));
+  Future<void> _navigateToDetail(TodoResponse todo) async {
+    final changed = await context.push<bool>(AppRoutes.todoDetail(todo.id));
+    if (changed == true) {
+      await _loadTodos(showPageLoader: false);
+    }
   }
 
   Future<void> _addTodo() async {
     final created = await context.push<bool>(AppRoutes.todoCreate);
     if (created == true) {
-      await _loadTodos();
+      await _loadTodos(showPageLoader: false);
     }
   }
 
@@ -326,25 +326,6 @@ class _TodoQuadrantsScreenState extends State<TodoQuadrantsScreen> {
         mainAxisSize: MainAxisSize.min,
         crossAxisAlignment: CrossAxisAlignment.center,
         children: [
-          AppPressable(
-            borderRadius: BorderRadius.circular(AppRadius.full),
-            onTap: _loadTodos,
-            child: Container(
-              width: 36,
-              height: 36,
-              decoration: BoxDecoration(
-                color: AppColors.messageBtnWrap,
-                borderRadius: BorderRadius.circular(AppRadius.full),
-                border: Border.all(color: AppColors.messageBtnBorder),
-              ),
-              child: const Icon(
-                LucideIcons.refreshCcw,
-                size: 18,
-                color: AppColors.slate600,
-              ),
-            ),
-          ),
-          const SizedBox(width: AppSpacing.sm),
           AppPressable(
             borderRadius: BorderRadius.circular(AppRadius.full),
             onTap: _addTodo,
@@ -448,6 +429,7 @@ class _TodoQuadrantsScreenState extends State<TodoQuadrantsScreen> {
                         horizontal: AppSpacing.sm,
                       ),
                       child: _TodoItemWidget(
+                        key: ValueKey(item.id),
                         item: item,
                         onComplete: () => _completeTodo(item),
                         onTap: () => _navigateToDetail(item),
@@ -603,6 +585,7 @@ class _TodoItemWidget extends StatefulWidget {
   final VoidCallback onTap;
 
   const _TodoItemWidget({
+    super.key,
     required this.item,
     required this.onComplete,
     required this.onTap,